Qwen 3 4B vs Gemini 2.5 Pro Preview
Compare Qwen 3 4B and Gemini 2.5 Pro Preview: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.
Updated 2026-05-21 · By Abhishek Raj · Our methodology
| Feature | Qwen 3 4B | Gemini 2.5 Pro Preview |
|---|---|---|
| Category | Compact | Frontier |
| Parameters | 4B | ~1.5T |
| Context Window | 128K | 2M |
| Input Price | $0.006/1M tokens | $0.07/1M tokens |
| Output Price | $0.012/1M tokens | $0.21/1M tokens |
| Latency | ~50ms | ~700ms |
Choose Qwen 3 4B when:
- ✓ Mobile apps
- ✓ Intent detection
- ✓ Preprocessing
Ultra-compact, Mobile-ready, Low cost
Choose Gemini 2.5 Pro Preview when:
- ✓ Research
- ✓ Long analysis
- ✓ Testing new capabilities
2M context, Experimental features, Strong reasoning
Verdict: Qwen 3 4B vs Gemini 2.5 Pro Preview
For cost efficiency, Qwen 3 4B wins at $0.006/1M input tokens. For speed, Qwen 3 4B is faster at ~50ms. Qwen 3 4B excels at Mobile apps while Gemini 2.5 Pro Preview is better for Research. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.
Detailed Analysis
Pricing Comparison
Qwen 3 4B costs $0.006/1M input tokens and $0.012/1M output tokens. Gemini 2.5 Pro Preview costs $0.07 input and $0.21 output. Qwen 3 4B is 11.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Qwen 3 4B has a 128K context window with ~50ms latency. Gemini 2.5 Pro Preview offers 2M context at ~700ms. Gemini 2.5 Pro Preview has the larger context window.
Best For
Qwen 3 4B (Compact) is optimized for: Mobile apps, Intent detection, Preprocessing. Gemini 2.5 Pro Preview (Frontier) works best for: Research, Long analysis, Testing new capabilities.
Try Both on XALEN
Both models are available through XALEN's OpenAI-compatible API. Switch between them by changing the model parameter:
from xalen import XALEN
client = XALEN(api_key="xln_test_YOUR_KEY")
# Use Qwen 3 4B
response_a = client.chat.completions.create(
model="qwen-3-4b",
messages=[{"role": "user", "content": "Your question here"}]
)
# Use Gemini 2.5 Pro Preview
response_b = client.chat.completions.create(
model="gemini-2-5-pro-preview",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, Qwen 3 4B or Gemini 2.5 Pro Preview?
Qwen 3 4B (Compact, 4B) offers Ultra-compact. Gemini 2.5 Pro Preview (Frontier, ~1.5T) offers 2M context. Choose Qwen 3 4B for Mobile apps or Gemini 2.5 Pro Preview for Research.
How much does Qwen 3 4B cost vs Gemini 2.5 Pro Preview?
Qwen 3 4B: $0.006/1M input, $0.012/1M output. Gemini 2.5 Pro Preview: $0.07/1M input, $0.21/1M output. Both available on XALEN with batch processing at 50% discount.
Can I use both models on XALEN?
Yes. XALEN provides 200+ models through a single OpenAI-compatible API. Switch between Qwen 3 4B and Gemini 2.5 Pro Preview by changing the model parameter. No code changes needed.
Related Comparisons
Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.